YARA · Malpedia signator rules
MALPEDIA_Win_Xagent_Auto
autogenerated rule brought to you by yara-signator
- Author
- Felix Bilstein - yara-signator at cocacoding dot com
- Date
- 2026-05-04
- Modified
- 2026-05-18
- Score / Quality
- 75 / 73
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Xagent.
It defines 26 patterns (0 text, 26 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-xagent-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xagent_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "e6749351-2438-58b5-875e-9b65c6d4bb5f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.xagent"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xagent_auto.yar#L1-L244"
= "N/A"
= "108c073665fdca68ab6c156d2bd80d154df30e277e99e8f7d93b99eb208d6ddb"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { c1ea02 6bd20d b801000000 2bc2 }
$sequence_1 = { ff15???????? 8bd8 e8???????? 03d8 }
$sequence_2 = { ff460c 03ff 03ff 3b7e0c 7707 c7460c00000000 49 }
$sequence_3 = { c7460c00000000 49 894e10 7507 c7460c00000000 }
$sequence_4 = { c20400 8d4de4 e8???????? b8???????? c3 83c8ff }
$sequence_5 = { 8b0482 8b0488 8b4e10 85c9 7423 8b7e08 ff460c }
$sequence_6 = { e8???????? 8b4604 85c0 7407 8b4d08 8b11 }
$sequence_7 = { 8b7a08 c1e802 83e103 3bf8 7702 2bc7 8b5204 }
$sequence_8 = { ff15???????? 6a08 e8???????? 83c404 85c0 }
$sequence_9 = { eb02 8b11 8b4808 8bc1 57 8b7a08 c1e802 }
$sequence_10 = { 740c 488b07 488b0b 488903 48890f 488b5c2430 488b6c2438 }
$sequence_11 = { 740c 488b07 4c8b13 488903 4c8917 488b13 488b0e }
$sequence_12 = { 4883792800 498bf9 498bf0 488bea }
$sequence_13 = { e8???????? 48833b00 740a 488b4308 }
$sequence_14 = { e8???????? 488b4328 4c8bcf 4c8bc6 }
$sequence_15 = { e8???????? 90 0fb705???????? 6689442420 }
$sequence_16 = { 7509 488b03 488bcb ff5008 488b7d8f }
$sequence_17 = { 4053 4883ec20 488b5910 4885db 7416 }
$sequence_18 = { b803b57ea5 f7e6 c1ea06 6bd263 }
$sequence_19 = { 75f8 492bca 4963c1 483bc1 }
$sequence_20 = { 75f8 492bc9 8bc3 483bc1 737f 4c8b4718 }
$sequence_21 = { 75f8 492bdc 498bfe 4d85f6 }
$sequence_22 = { 75f8 492bfc 498bf5 4d85ed }
$sequence_23 = { 75f8 492bf5 ff15???????? 8d0c3e }
$sequence_24 = { 75f8 492bdd 488bf7 4885ff }
$sequence_25 = { 75f8 492bf5 488bfb 4885db }
condition:
7 of them and filesize < 729088
}
Strings (26 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c1ea02 6bd20d b801000000 2bc2 } | |
| $sequence_1 | hex | { ff15???????? 8bd8 e8???????? 03d8 } | |
| $sequence_2 | hex | { ff460c 03ff 03ff 3b7e0c 7707 c7460c00000000 49 } | |
| $sequence_3 | hex | { c7460c00000000 49 894e10 7507 c7460c00000000 } | |
| $sequence_4 | hex | { c20400 8d4de4 e8???????? b8???????? c3 83c8ff } | |
| $sequence_5 | hex | { 8b0482 8b0488 8b4e10 85c9 7423 8b7e08 ff460c } | |
| $sequence_6 | hex | { e8???????? 8b4604 85c0 7407 8b4d08 8b11 } | |
| $sequence_7 | hex | { 8b7a08 c1e802 83e103 3bf8 7702 2bc7 8b5204 } | |
| $sequence_8 | hex | { ff15???????? 6a08 e8???????? 83c404 85c0 } | |
| $sequence_9 | hex | { eb02 8b11 8b4808 8bc1 57 8b7a08 c1e802 } | |
| $sequence_10 | hex | { 740c 488b07 488b0b 488903 48890f 488b5c2430 488b6c2438 } | |
| $sequence_11 | hex | { 740c 488b07 4c8b13 488903 4c8917 488b13 488b0e } | |
| $sequence_12 | hex | { 4883792800 498bf9 498bf0 488bea } | |
| $sequence_13 | hex | { e8???????? 48833b00 740a 488b4308 } | |
| $sequence_14 | hex | { e8???????? 488b4328 4c8bcf 4c8bc6 } | |
| $sequence_15 | hex | { e8???????? 90 0fb705???????? 6689442420 } | |
| $sequence_16 | hex | { 7509 488b03 488bcb ff5008 488b7d8f } | |
| $sequence_17 | hex | { 4053 4883ec20 488b5910 4885db 7416 } | |
| $sequence_18 | hex | { b803b57ea5 f7e6 c1ea06 6bd263 } | |
| $sequence_19 | hex | { 75f8 492bca 4963c1 483bc1 } | |
| $sequence_20 | hex | { 75f8 492bc9 8bc3 483bc1 737f 4c8b4718 } | |
| $sequence_21 | hex | { 75f8 492bdc 498bfe 4d85f6 } | |
| $sequence_22 | hex | { 75f8 492bfc 498bf5 4d85ed } | |
| $sequence_23 | hex | { 75f8 492bf5 ff15???????? 8d0c3e } | |
| $sequence_24 | hex | { 75f8 492bdd 488bf7 4885ff } | |
| $sequence_25 | hex | { 75f8 492bf5 488bfb 4885db } |
Condition
7 of them and filesize < 729088In plain words (Heuristic)
- The file must be smaller than 729088 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
Licence & attribution
Author: Felix Bilstein - yara-signator at cocacoding dot com
Source repository: Malpedia signator rules @ c901f97b7d
Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: e6749351-2438-58b5-875e-9b65c6d4bb5f
Metadata
| version | 1 |
|---|---|
| tool | yara-signator v0.6.0 |
| signator_config | callsandjumps;datarefs;binvalue |
| malpedia_rule_date | 20260422 |
| malpedia_hash | a182e35da64e6d71cb55f125c4d4225196523f14 |
| malpedia_version | 20260504 |
| malpedia_license | CC BY-SA 4.0 |
| malpedia_sharing | TLP:WHITE |
Tags:FILE
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